Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Carrot mottle umbravirus

Index

• Nomenclature
• Host range, transmission and symptoms
• Physical and biochemical properties
• Taxonomy and relationships
• Comments and References

Data collated by P.M. Waterhouse, 1986.

Nomenclature

Synonyms

carrot motley dwarf virus (Stubbs, 1948; 1952).

Acronym

CMoV

ICTV decimal code

78.0.1.0.003

Host range and symptoms

Natural host range and symptoms

• Daucus carota, Anethum graveolens, Anthriscus sylvestris - symptomless but, with CRLV, induces yellowing and reddening.

Transmission

Transmitted by a vector; an insect; Cavariella aegopodii; Aphididae. Transmitted in a persistent manner. Virus retained when the vector moults; does not multiply in the vector; not transmitted congenitally to the progeny of the vector; requires, for vector transmission, a helper virus (carrot red leaf luteovirus); transmitted by mechanical inoculation; not transmitted by seed; not transmitted by pollen.

Geographical distribution

Spreads in Australia, Canada, Germany, Japan, New Zealand, the UK, and the USA.

Experimental host range

Several (3-9) families susceptible. Experimentally infected plants mostly show local lesions, mottling.

Diagnostically susceptible host species and symptoms

• Chenopodium quinoa - local lesions.
• Nicotiana clevelandii - systemic vein etching.
• Phaseolus vulgaris cv. `The Prince' - brown local lesions.
• Coriandrum sativum - systemic mottle.

Diagnostically insusceptible host species

Lactuca sativa.

Maintenance and propagation hosts

Nicotiana clevelandii.

Assay hosts (Local lesions or Whole plants)

Chenopodium quinoa (L); Nicotiana clevelandii (W); Phaseolus vulgaris (L).

Susceptible host species

• Anethum graveolens
• Anthriscus sylvestris
• Apium graveolens
• Chenopodium amaranticolor
• Chenopodium capitatum
• Chenopodium quinoa
• Coriandrum sativum
• Daucus carota
• Gomphrena globosa
• Nicotiana benthamiana
• Nicotiana clevelandii
• Nicotiana glutinosa
• Nicotiana rustica
• Petroselinum crispum
• Phaseolus vulgaris

Insusceptible host species

• Lactuca sativa

Families containing susceptible hosts

• Amaranthaceae (1/1)
• Chenopodiaceae (3/3)
• Leguminosae-Papilionoideae (1/1)
• Solanaceae (4/4)
• Umbelliferae (6/6)

Families containing insusceptible hosts

• Compositae (1/1)

Sources of host-range data

Waterhouse (1981); Watson et al. (1964); Murant et al. (1969, 1973); Murant (1975); Frowd and Tomlinson (1972).

Physical and biochemical properties

Properties of particles in sap

TIP: 70 °C. LIV: 0.2-1 days. DEP: log₁₀ minus 3. Infectivity of sap not changed by treatment with di-ethyl ether.

Purification method

Murant et al. (1969).

Particle morphology

Virions unusually shaped; virions not identified; vesicles reported, but unconfirmed.

Physical properties

One sedimenting component in purified preparations; sedimentation coefficient 270 S. Density 1.15 g cm^-3 in CsCl.

Biochemical properties

Genome consists of RNA; single-stranded; linear. Total genome size 4.75 kb. Genome unipartite; largest (or only) genome part 4.75 kb.

NCBI sequence data (Entrez search)

Replication

Replication does not depend on a helper virus.

Cytopathology

Other cellular changes: outgrowths from plasmodesmatal, seen by light microscopy.

Taxonomy and relationships

Umbravirus

Additional comments on relationships

CMotV resembles viruses such as lettuce speckles mottle and groundnut rosette and other sap-transmitted components of luteovirus-containing virus symbioses; the name umbravirus has been proposed for these viruses. Preliminary sequence information indicates a relationship with the carmo/tombus/luteovirus cluster (M.J. Gibbs, unpublished text).

Best tests for diagnosis

Lettuce speckles mottle virus infects manually inoculated lettuce, CMotV does not.

Comments and References

General comments

Carrot motley dwarf virus (Stubbs, 1948; 1952) is a complex of carrot red leaf and carrot mottle viruses.

References

• Frowd, J.A. and Tomlinson, J.A. (1972). Ann. appl. Biol. 72: 177.
• Halk, E.L., Robinson, D.J. and Murant, A.F. (1979). J. gen. Virol. 45: 383.
• Murant, A.F. (1974). CMI/AAB Descr. Pl. Viruses No. 137, 4 pp.
• Murant, A.F. (1975). Can. Pl. Dis. Surv. 55: 103.
• Murant, A.F., Goold, R.A., Roberts, I.M. and Cathro, J. (1969). J. gen. Virol. 4: 329.
• Murant, A.F., Roberts, I.M. and Goold, R.A. (1973). J. gen. Virol. 21: 269.
• Murant, A.F., Waterhouse, P.M., Raschke, J.H. and Robinson, D.J. (1985). J. gen. Virol. 66: 1575.
• Stubbs, L.L. (1948). Aust. J. sci. Res. 1: 303.
• Stubbs, L.L. (1952). Aust. J. sci. Res. 5: 399.
• Waterhouse, P.M. (1981). Ph.D. Thesis, University of Dundee, U.K., 244 pp.
• Watson, M.A., Serjeant, E.P. and Lennon, E.A. (1964). Ann. appl. Biol. 54: 153.

Cite this publication as: Brunt, A.A., Crabtree, K., Dallwitz, M.J., Gibbs, A.J., Watson, L. and Zurcher, E.J. (eds.) (1996 onwards). `Plant Viruses Online: Descriptions and Lists from the VIDE Database. Version: 16^th January 1997.' URL http://biology.anu.edu.au/Groups/MES/vide/

Dallwitz (1980) and Dallwitz, Paine and Zurcher (1993) should also be cited.